After BBA or any graduation degree you can apply for ICSI Executive program. The Institutes of Company Secretaries of India(ICSI) is having 3 levels or mode: Foundation, Executive and Professional. Candidates who are 12th passed or appearing graduation are eligible to apply for foundation program. Candidates who have passed graduation are eligible to apply for Executive program. You need to apply online for ICSI Executive program after completing your BBA. For further queries I have been uploaded the prospectus of ICSI.